Managing Disturbance Echoes - Emerson Rosemount 5408 Reference Manual

Set echo curve range
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Set timeline resolution
To set the resolution of the level trend timeline:
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7.4.2

Managing disturbance echoes

There are two general methods for managing disturbance echoes:
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Amplitude thresholds
The amplitude thresholds are used to filter out noise and disturbing echoes from the
product surface echo. The transmitter uses certain criteria to decide which type of echo
peak that is detected. Only echoes above the amplitude threshold might be considered
the product surface. The amplitude threshold can either be set to a constant value, or split
into sections as defined by up to 10 anchor points.
Rosemount 5408 and 5408:SIS Level Transmitters
Under Service Tools, select Echo Curve.
Select Options.
Under Echo Curve Range, select User Defined.
Enter the desired values.
Select Save.
Select Back.
Under Service Tools, select Echo Curve.
Select Options.
In the Timeline Resolution list, select the desired length (in hours) of the timeline.
Select Save.
Select Back.
Set amplitude thresholds to filter out weak disturbance echoes and noise.
Use the suppress false echoes function to manage strong disturbance echoes.
Service and Troubleshooting
101